Solar Case Study

Case Study

CF009 Parc Eirin, Tonyrefail, Wales

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At a Glance






Photon Energy


225 New Homes


Clearline fusion PV16-300


414 kWp


Spring 2019

Pobl is one of the largest housing providers in Wales. Tirion Homes is an independent not-for-profit residential developer. Sero Energy is an innovative start up that provides clean energy services for domestic properties. These three organisations working in partnership with Main Contractor Morganstone and specialist solar company Photon Energy, are pioneering a housing development that is the first of its kind in the UK.

Parc Eirin, comprising 225 two, three and four bedroom homes in Tonyrefail, Porth is the UK's largest low-carbon housing development. The homes successfully integrate advanced renewable technology solutions including ground-source heat pumps, solar PV, battery storage and electric vehicle charging, all centrally managed by a smart energy platform developed by Sero Group.

Insulation levels exceed those in current building regulations to minimise heat losses; heating is provided by ground-source heat pumps with underfloor heating to the ground floor; intelligent hot water cylinders optimise how much hot water is stored and electricity is provided by Clearline fusion solar panels. Each home also comes complete with battery electricity storage and a 3-phase fast home electric vehicle charger.

Sero provides an energy management service for the homes at Parc Eirin which aims to ensure that the occupants' energy needs are met at the lowest cost and lowest carbon. By virtually combining all the homes at Parc Eirin, as well as using smart forecasting and energy storage, Sero bulk-buys electricity like a commercial user at the most economic and low carbon times. The electricity is then stored in the homes batteries for later use lowering costs for residents. At the same time Sero to provides services energy services to the National Grid that help support more renewablesin the energy mix.

Eva Tejedor, Senior Engineer at Photon Energy said:

"This is one of the first large scale projects including Solar, Storage and EV Charging in new build homes in the UK. This is a huge accomplishment for Photon Energy, incorporating our core services into new residential projects. Viridian Solar has been our preferred supplier of roof integrated solar for many years and the Clearline fusion in-roof solar PV Photon Energy installed at Parc Eirin combines the highest quality, ease of installation and good looks."